RESUMO
Objective@#To understand the possible transmission route of a family cluster of COVID-19 in Zhengzhou and the potential infectivity of COVID-19 in incubation period, and provide scientific evidence for the timely control of infectious source and curb the spread of the epidemic.@*Methods@#Epidemiological investigation was conducted for a family cluster of COVID-19 (8 cases) with descriptive epidemiological method, and respiratory tract samples of the cases were collected for the nucleic acid detection of 2019-nCoV by RT-PCR.@*Results@#Two primary cases, which occurred on 31 January and 1 February, 2020, respectively, had a common exposure history in Wuhan. The other six family members had onsets on 30 January, 31 January, 1 February (three cases) and 3 February, 2020.@*Conclusions@#In this family cluster of COVID-19, six family members were infected through common family exposure to the 2 primary cases. Five secondary cases had onsets earlier than or on the same day as the primary cases, indicating that COVID-19 is contagious in incubation period, and the home isolation in the early phase of the epidemic might lead to the risk of family cluster of COVID-19.
RESUMO
Respiratory mechanical parameters are the key indexes in evaluating the respiratory function of an anaesthetized patient during operation. The measurement of respiratory parameters plays an important role in clinic, and can dynamically monitor the working state of a respirator, direct the use of a respirator and monitor the respiratory function of a patient in intensive care unit(ICU). This paper introduces a new method that will break the traditional limitations, can measure eleven respiratory parameters and demonstrate the results by digital and diagrams.